Modbus. Instructions 42/ EN

Transcription

1 0XOW9VRQ Modbus Instructions 42/ EN

2 Contents 1 Electrical Connection Device Mode Important Information For Users Parameters Flow Buffer Optional Texts On Display Register Map Contact It is possible to change the device mode from "Operate" to "Config." and vice versa by pressing simultaneously the keys 100 %, 0 % and write protection Ç. The keys must be pressed at least 3 sec during power up. The following table shows which keys have to be pressed. Caution: During configuration (Config. mode) open-loop controls / control systems (PS, SPS ) should be separated from the transmitter. Key 0% Key 100% Write protection key Device mode 1 Electrical Connection The relevant guidelines must be observed during the electrical installation! Since the transmitter has no switch-off elements, overcurrent protection devices or mains disconnection possibilities must be provided on the system side (overvoltage protection at option). Check that the existing operating voltage corresponds to that indicated on the type plate. For power supply and output signal, the same lines are used. Consult the enclosed connection diagram! Depending on the supplied model, the electrical connection is made via cable entry 1/2-14 NPT or M 20 x 1.5 or via plug an 8 U. The screw terminals are suitable for wire cross-sections up to 2.5 mm2. X X - Operate X X X Configuration X = pressed key (during power up) Assignment for RS 232 RxD COM (+) TxD COM (-) Ground Power (-) 3 Important Information For Users The transmitter operates on terminal voltage of 10.5V 30V dc. The quiescent supply current is 10mA typically. The transmitting supply current does not exceed 25mA. MODBUS Characteristic curve 20,00 18,00 16,00 14,00 Current / [ma] 12,00 10,00 8,00 6,00 4,00 min. current max. current quiescent current 2,00 0,00 0,0 5,0 10,0 15,0 20,0 25,0 30,0 35,0 2 Device Mode The device uses two modes. An Operate mode and a Config mode can be selected. The Operate mode provides only the process parameters and some further parameters, that allow a simple configuration of the device. These parameters are shown in the chapter Register Map. In the Config mode the device can be configured with the SMART VISION Modbus-DTM. Voltage / [V] The transmitter uses 2-wire half-duplex RS-485 Modbus. The transmitter uses 8 bit Remote Terminal Unit (RTU) data transmission. The communication parameters are set at 8 data bits, 1 stop bit and no parity bit. These parameters are not configurable. For communication via SMART VISION the DTM for Modbus have to be used. 2 of 8 42/ for Modbus

3 The master gets an exception response if an error occurs after a request was received. The following error codes are possible: Code Name Reason 01 IEGA FUNCTION Function code is not supported 02 IEGA DATA ADDRESS coil/register-address does not exist, parameter can not be accessed with the Modbus interface, only one half of a float value was written 03 IEGA DATA VAUE Value out of range, setting not accepted 04 SAVE DEVICE FAIURE Internal error 05 ACKNOWEDGE Does not appear 06 SAVE DEVICE BUSY Device is performing a reset to factory defaults or device is writing data to Flow Buffer Memory 07 NEGATIVE ACKNOWEDGE Does not appear 08 MEMORY PARITY ERROR Error in Flow Buffer Memory The master can poll diagnostic information. Therefore the Modbusfunction code 08 is used. Following subcodes are supported: Contents of the diagnostic register: Bit Name Descriptiom 0 EEPROM_ERROR Eeprom error sensor or mainboard electronics 1 EEPROM_DATA_ERROR Eeprom checksum error 2 AARM_ROM Rom checksum error 3 AARM_RAM Ram checksum error 4 MAFUNCTION Device malfunction. 5 SW_MAFUNCTION Software malfunction. 6 MEM_CKSUM Memory error. 7 MEASUREMENT Failure in measurement. 8 MAINTENANCE Maintenance required. 4 Parameters Device mode 0=Operate, 1=Config Baud Rate 1=1200 Baud 2=2400 Baud 3=4800 Baud 4=9600 Baud Bus Address Response Delay Time ms Code Name Description 00 Return Query Data Return same data as received 01 Restart Comm Option Restart Modbus communication 02 Return Diagnostic Register See diagnostic register 0A Clear Counters and Diagnostic Clear all supported coun- Register ters and diagnostic register 0C 0D 0E Return Bus Communication Error Count Return Bus Exception Error Count Return Slave Message Count CRC errors since last restart Exceptions since last restart Quantity of messages addressed to the slave since last restart Remarks on electromagnetic compatibility / power supply The requirements of the electromagnetic compatibility (EMC) according to DIN EN have to be met. For this purpose all cables led into the transmitter must be screened! Special cables are not necessary. For the power supply / communication as well as for the connection of the PT100 resistance thermometer screened 4-wire cables must be used. On the part of the transmitter, the screen has to be applied on the EMC-compatible screw connection just as on the power supply / communication side. Please also observe that the power supply of the transmitter as well as of the communication unit and an optionally connected PC / Notebook are potential-free. Otherwise the data line has to be decoupled galvanically. Reset To Factory Data 1=Reset to factory data 1) 1) due to this action (address 491) the device does not give a signal for max. 1 min. Differential pressure unit Pressure unit Temperature unit Volume flow unit Mass flow unit / Volume flow unit Pressure Unit Table: See Pressure Unit Table See Pressure Unit Table See Temperature Unit Table See Volume Flow Unit Table See Mass Flow Unit Table Unit code Pressure unit 1 inches of water 2 inches of mercury 3 feet of water 4 millimeters of water 5 millimeters of mercury 6 pounds per square inch 7 Bar 8 Millibar 9 gram per square centimeter 10 kilogram per square centimeter 11 Pascal 12 Kilopascal 13 Torr 14 Atmospheres 117 Megapascal / for Modbus 3 of 8

4 Temperature Unit Table: Unit code Temperature unit 32 degree Celsius 33 degree Fahrenheit 34 degree Rankine 35 Kelvin Volume Flow Unit Table: Unit code Volume flow unit 15 cubic feet per minute 16 US gallon per minute 17 liter per minute 18 Imperial gallon per minute 19 cubic meter per hour 22 US gallon per second 23 mega US gallon per day 24 liter per second 25 megaliter per day 26 cubic feet per second 27 cubic feet per day 28 cubic meter per second 29 cubic meter per day 30 Imperial gallon per hour 31 Imperial gallon per day 68 US gallon per day 130 cubic feet per hour 131 cubic meter per minute 132 barrel per second 133 barrel per minute 134 barrel per hour 135 barrel per day 136 US gallon per hour 137 Imperial gallon per second 138 liter per hour 242 mega cubic feet per day Mass Flow Unit Table: Unit code Mass flow unit 70 gram per second 71 gram per minute 72 gram per hour 73 kilogram per second 74 kilogram per minute 75 kilogram per hour 76 kilogram per day 77 metric ton per minute 78 metric ton per hour 79 metric ton per day 80 pound per second 81 pound per minute 82 pound per hour 83 pound per day 84 short ton per minute 85 short ton per hour 86 short ton per day 87 long ton per hour 88 long ton per day Zeropoint correction Cal Point i DP Cal Point o DP Cal Point i P Cal Point o P Cal Unit DP/P Cal Point i T Cal Point o T Cal Unit T 5 Flow Buffer Writing any value starts zeropoint correction To perform a trim the process value has to be applied to the device and then the applied value has to be written to the corresponding register. It is possible to select the unit for the calibration. The mass flow or the volume flow can be integrated and stored in registers. A starting point has to be defined for the calculation of the flow value. The integration of the flow will start when the starting point is set. The time since the starting point was set is counted and stored in the parameter Flow Buffer Time. The integration time constant is 1 sec. The flow is integrated in the RAM Parameter Flow Buffer Actual. After one hour, the calculated flow value is stored non volatile in one of the Flow Buffer our registers. Flow Buffer Actual is cleared and the flow will be integrated again. After another hour, the calculated flow value will be stored non volatile and so on. There are 23 Flow Buffer our registers. After 24 hours the contents of the Flow Buffer our registers and the last calculated flow value will be added up and stored in the Flow Buffer Day registers. Then the hour registers are cleared. In the Flow Buffer Day registers 35 values can be stored. It is a circular buffer. After 36 days the first day register will be overwritten. The value of the counted days will be set to one. The counting of the days is module 35, thus the value of the counted days points to the latest day value in the buffer. The other day registers will not be changed. Flow Buffer Selection Flow Buffer Action Flow Buffer Total Flow Buffer Actual Flow Buffer our x Flow Buffer Day Flow Buffer Time 2) these actions can take up to 10 sec. 0 = off, 1 = Volume Flow, 2 = Mass Flow / Standard Volume Flow 0 = stop 1 = start 2 = clear last hour and stop 3 = clear hour registers and stop 4 = clear day registers and stop 2) 5 = clear all and stop 2) Total flow since starting point Flow since last hour Flow in hour x since start of the last day Flow on day x (x counted since start module 35) Days ours Min Sec since start (4 byte) 4 of 8 42/ for Modbus

5 The daily values of the flow memory are stored in an additional data area in the EEPROM. If an error occurs in this area, it can be recognized but not removed. An error bit is set in diagnosis. Values which are not affected by this error can still be read. If a faulty value is stored again in the EEPROM and the error is eliminated in this way, the respective value can be read again. By clearing the daily memory, the error bit is reset. All parameters in the buffer memory can be accessed in the "Operate" mode. 6 Optional Texts On Display Under the Display menu an option User-Text can be selected. It allows displaying a string written via Modbus. The text is filed from register 1001 to The first 7 bytes are shown in the first line, the last bytes in the second line. It is only possible to write all 7 registers in an access with the function WriteMultipleRegister(16). 1st line nd line Activation: 1. Press mode key "M". 2. Press key "+" (or key "-") as long as the menu option USER TEXT appears. 3. Acknowledge by mode key "M". 4. Display OK, i.e. the action is stored non-volatile. 5. Quit program via menu option "EXIT" using key "+" / "-". 7 Register Map All registers in this document are referenced to one. The Modbus messages are referenced to zero. This means that the number of the mapped register is one higher than the number that is sent in a Modbus message frame. There is a difference between function code 3 and function code 4. Function code 4 can be executed in less time than function code 3. Function code 4 is meant to access the process parameters, which possibly could be polled in a low cycle time (>100ms). Therefore the data of the parameters is held in an internal buffer, which has a low access time. Function code 3 should be used to access parameters non cyclic or with a high cycle time (>seconds). By reading or writing 32 bit or 16 bit registers 4 or 2 byte are transmitted. If a parameter has a datatype which uses less bytes than that, the data is transmitted in the lower data bytes of the modbus message frame. The data bytes, that are not used, are set to zero. To access the following parameters the device mode has to be set to Operate. 32-Bit-Register Caution: over Function Code 04 it is faster to read as over Function Code 03. Address Parameter Name Data Type 21 Differential Pressure (DP) Function Code Float 04 R 22 Pressure (P) Float 04 R 23 Process Temperature Float 04 R (T) 24 Normal Volume Flow/ Float 04 R Mass Flow (NVF/MF) 25 Volume Flow (VF) Float 04 R 26 Diagnosis1+2 Usign32 03,04 R 27 DiagnosisExtension3 Usign16 03,04 R 28 DiagnosisExtension1+2 Usign32 03,04 R 41 Upper Calibration Point DP 42 ower Calibration Point DP 43 Upper Calibration Point P 44 ower Calibration Point P 45 Calibration Unit Pressure 46 Upper Calibration Point T 47 ower Calibration Point T 48 Calibration Unit Temperature 51 Damping Time Constant DP 53 Damping Time Constant T 54 Balance Oblique Sensor Read/ Write Usign16 03,06,16 R/W Usign16 03,06,16 R/W Usign8 03,06,16 R/W 121 Flow Buffer Selection Usign8 03,06,16 R/W 122 Flow Buffer Action Usign8 03,06,16 R/W 123 Flow Buffer Time Usign32 03 R 124 Flow Buffer Total Float 03 R 125 Flow Actual Float 03 R 126 Flow Buffer our 1 Float 03 R 127 Flow Buffer our 2 Float 03 R Flow Buffer our 23 Float 03 R 156 FlowBuffer Day 1 Float 03 R 157 FlowBuffer Day 2 Float 03 R Flow Buffer Day 35 Float 03 R / for Modbus 5 of 8

6 16-Bit-Register Address Parameter Name Data Type Function Code Read/ Write 401 Differential Pressure 1/2Float 04 R (DP) 402 1/2Float 04 R 403 Pressure (P) 1/2Float 04 R 404 1/2Float 04 R 405 Process Temperature 1/2Float 04 R (T) 406 1/2Float 04 R 407 Normal Volume Flow/ 1/2Float 04 R Mass Flow (NVF/MF) 408 1/2Float 04 R 409 Volume Flow(VF) 1/2Float 04 R 410 1/2Float 04 R 411 Diagnosis2 Usign16 03,04 R 412 Diagnosis1 Usign16 03,04 R 414 DiagnosisExtension3 Usign16 03,04 R 415 DiagnosisExtension2 Usign16 03,04 R 416 DiagnosisExtension1 Usign16 03,04 R 441 Upper Calibration Point 1/2 DP 442 1/2Float 443 ower Calibration Point 1/2 DP 444 1/2Float 445 Upper Calibration Point 1/2 P 446 1/2Float 447 ower Calibration Point 1/2 P 448 1/2Float 450 Calibration Unit Usign16 03,06,16 R/W Pressure 451 Upper Calibration Point 1/2 T 452 1/2Float 453 ower Calibration Point 1/2 T 454 1/2Float 456 Calibration Unit Temperature Usign16 03,06,16 R/W 485 Volume Flow Unit Usign16 03,06,16 R/W 491 Factory Reset Usign16 03,06,16 R/W 492 Write ock Usign16 03,06,16 R/W 493 MV Block on/off Usign8 03,06,16 R/W 501 Device Mode Usign8 03,06,16 R/W 502 Baud Rate Usign8 03,06,16 R/W 503 Bus Address Usign8 03,06,16 R/W 504 Response Delay Time Usign8 03,06,16 R/W 602 Flow Buffer Selection Usign8 03,06,16 R/W 604 Flow Buffer Action Usign8 03,06,16 R/W 605 Flow Buffer Time (MSW) Usign16 03 R 606 Flow Buffer Time (SW) Usign R 607 Flow Buffer Total 1/2Float 03 R 608 1/2Float 03 R 609 Flow Actual 1/2Float 03 R 610 1/2Float 03 R 611 Flow Buffer our 1 1/2Float 03 R 612 1/2Float 03 R 613 Flow Buffer our 2 1/2Float 03 R 614 1/2Float 03 R Flow Buffer our 23 1/2Float 03 R 656 1/2Float 03 R 671 Flow Buffer Day 1 1/2Float 03 R 672 1/2Float 03 R 673 Flow Buffer Day 2 1/2Float 03 R 674 1/2Float 03 R Flow Buffer Day 35 1/2Float 03 R 740 1/2Float 03 R 461 Damping Time 1/2 Constant DP 462 1/2Float 465 Damping Time 1/2 Constante T 466 1/2Float 468 Balance Oblique Sensor Usign8 03,06,16 R/W 481 Differential Pressure Usign16 03,06,16 R/W Unit 482 Pressure Unit Usign16 03,06,16 R/W 483 Temperature Unit Usign16 03,06,16 R/W 484 Mass Flow Unit / Volume Flow Unit Usign16 03,06,16 R/W 6 of 8 42/ for Modbus

7 Coils Address Parametername Function Code Read/ Write Meaning 1 Diagnosis 01,02 R ardware error 2 01,02 R Memory error 3 01,05 R Measurement error 4 01,02 R Configuration invalid 5 01,05 R Maintenace required 6 Diagnosis- Extension 01,02 R EEPROM error mainboard 7 01,02 R EEPROM error sensor 8 01,02 R max. write cyles EEPROM mainboard 9 01,02 R max. write cyles EEPROM sensor 10 01,02 R EEPROM error electronic data 11 01,02 R EEPROM error sensor data ,02 R EEPROM error user data 13 01,02 R EEPROM error factory default data 14 01,02 R Saving eeprom data 15 01,02 R Device busy 16 01,02 R ROM error 17 01,02 R RAM error 18 01,02 R Device malfunction 19 01,02 R Software malfunction 20 01,02 R ,02 R Multivariable differential pressure input out of range 22 01,02 R Multivariable pressure input out of range 23 01,02 R Multivariable temperature input out of range 24 01,02 R Temperature transducer block temperature input out of limits 25 01,02 R Temperature transducer block temperature input out of range 26 01,02 R Pressure transducer block main pressure input out of limits 27 01,02 R Pressure transducer block main pressure input out of range 28 01,02 R Pressure transducer block temperature input out of limits 29 01,02 R Pressure transducer block static pressure input out of limits 8 Contact ABB Automation Products Gmb Schillerstraße Minden DEUTSCAND / for Modbus 7 of 8

8 This Technical Documentation is subject to copyright. Translation, reproduction and distribution in any form even as a revised version or in extracts are forbidden without prior permission of the holder of rights; particularly reprint, photomechanical or electronic reproduction and storage in data processing systems or data networks are not allowed. Offenders will be prosecuted and civil action brought against them. ABB Automation Products Gmb Schillerstrasse Minden DEUTSCAND Tel. +49(0) Fax +49(0) Technical revision reserved Printed in the Fed. Rep. of Germany 42/ EN